Spectral triple - Open Access .click

Proceedings of the Steklov Institute of Mathematics, 2021
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Turilova E.A., Hamhalter J.
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Minimal Square Spectral Factors via Triples

SIAM Journal on Matrix Analysis and Applications, 2001
The authors consider the problem of parametrizing the set of square minimal spectral factors of a rational matrix function taking positive semidefinite values (poles or zeros are admissible) on the imaginary axis in terms of invariant subspaces and of the minimal unitary left divisors of a certain unitary function.
Petersen, M. A., Ran, A. C. M.
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$��$-Deformation and Spectral Triples

2011
The aim of the paper is to answer the following question: does $ $-deformation fit into the framework of noncommutative geometry in the sense of spectral triples? Using a compactification of time, we get a discrete version of $ $-Minkowski deformation via $C^*$-algebras of groups. The dynamical system of the underlying groups (including some Baumslag-
Iochum, B. +3 more
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fos: mathematics
operator algebras math.oa
mathematics - operator algebras

fos: physical sciences
noncommutative geometry
mathematical physics math-ph

mathematical physics
noncommutative geometry à la connes
noncommutative differential geometry